DC and Tone

[Don]

Hi David,

Nope! The piano that became *thin* was the one where the humidifier became
unplugged. 


At 07:11 PM 3/7/98 -0700, you wrote:
>So if I'm reading this correctly, Kawai's need a drier RH, Yamaha's more wet?
>Interesting.  I wonder what the reason is!
>
>Don wrote:
>
>> Hi all,
>>
>> I have a client who is lucky enough to have to Kawai GS60 (6'9") with
>> consecutive serial numbers. Both are equipped with full DC systems (i.e.
>> three drier bars per instrument). The controllers were fighting each other
>> so I disconnected one controller and ran the system from one piano to
the other.
>>
>> This winter the *second* piano some how became unplugged (while the owner
>> was busy having a heart attack). The tone color of the unplugged humidifier
>> instrument was much *thinner*. I plugged it in and the tone has returned to
>> where it was before.
>>
>> At 11:00 AM 3/7/98 -0700, you wrote:
>> >
>> >Just recently (a week ago) I installed a "wet" humidistat which centers
>> >humiditiy at 48% RH instead of the usual 42%. My customer who has an
>> >unusually fine Yamaha CF about 20 years old but rebuilt is always looking
>> >for more power and carrying power. To our amazement the piano went out
>> >of tune but the carrying power increased another major amount. My customer
>> >had suspected that the tone got better when we had rainy seasons. I think
>> >I'm convinced now. The customer momentarily is ecstatic.
>> >
>> >What do some others of you think who have experienced this kind of change?
>> >
>> >My present thinking is that the board has pushed up a little stronger
>> >against the strings and that the impedance between strings and board has
>> >changed enough so that there is more resistance of the board to the
>> >energy of the string's downward pressure and that this causes the duration
>> >to increase, but I can't understand the greater power also.
>> >
>> >Jim Coleman, Sr.
>> >
>> >
>> Regards,
>> Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
>> "Tuner for the Centre of the Arts"
>> drose@dlcwest.com
>> 3004 Grant Rd.
>> REGINA, SK
>> S4S 5G7
>> 306-352-3620 or 1-888-29t-uner
>
>
>
>
Regards, Don